Bessemer converter bath measuring



Dec. 15, 1942. J. w. PERCY BESSEMER CONVERTER BATH MEASURING Filed March29, 1941 Patented Dec; 15, 1942 UNITED STATES PATENT OFFICE BESSEMERCONVERTER BATH MEASURING James Ward Percy, Jersey City, N. .L, assignorto United States Steel Corporation of Delaware, a corporation ofDelaware Application March 29, 1941, Serial No. 385,947

3 Claims. (01.266-35) This invention is mainly concerned with The device9 may be any that permits the measuring the temperature of the bath inan energy radiating from the bath through the operating Bessemerconverter, but its principles tuyere hole, to be measured. Filters maybe may be applicable for other purposes. used to make the device 9responsive to restrict- A specific example of the invention is illusedradiation frequency ranges as is often done trated by the accompanyingdrawing schematiin optical pyrometry. Likewise, it may be necescallyillustrating in vertical section a convensary to use a lens system forfocusing the rational Bessemer converter bottom embodying the diation onthe sensitive element of the device 9,-

example. i and water or air cooling of the radiant energy Morespecifically, this drawing shows the botmeasurin devi e may prove n cearytom shell I, the tuyeres 2 with their air holes 3 It is to beunderstood that the blast in the and the wind chest 4 which carries theair blast d st p v d an a r p s r at t tuy to the holes 3 of the varioustuyeres. The blast nose that exceeds the ferrostatic pressure of therises through these holes so as to be forced ba hthrough the metal bathabove the bottom and t is appa nt hat th nv t n dis s d p burn out thevarious impurities. This bath is, mits all the pri iples of optical py'y and of course, contained by the usual body to which" di t n ymeasuring in neral, t b apthe illustrated bottom is fixed. plieddirectly to a Bessemer converter bath, the

As is well known, flame, smok and fume'leave invention providing for anunobscured view of the converter nose so that it is impossible to thebath- This w y be Obtained through directly see the bath. As a result,the bath temne or any number of the tu re holes and th peratures haveheretofore been calculated by inradiant r y m s ring device may be anydirect determination methods, capable of quantitatively or qualitativelymeasur- According to the present invention, a tube 5 ing the energyradiated from the bathcontaining a series of optical diaphragms 6 and\ Iclaim! having its outer end provided with an airtight A Bessemer ve thaving a Optical housing 1, is mounted in an airtight manner sightingpassa ew y built directly in its wellhethrough the cover plate 8 of thewind chest 4. neath t o al p rati l v l f th meta The housing 1 houses aradiant energy responit contains at such an angle that this metal sivedevice 9 which is illustrated as a photronic tends to fiow into thepassage y, mean for cell, the arrangement being such that the tubemaintaining a a pre sure insaid' passageway 5 sightsthe device 9 axiallyup through one of to keep the metal from flowing thereinto and the holes3 of one of the tuyeres 2 directly at radiant e y measuring means si atthe the molten metal held above this tuyere by the metal through said pw yblast, the device receiving direct energy radia- 2; A Bessemerconverter having a device sealed tion from the bath and th diaphragms 6being substantially airtight in its wind chest in line arranged toshield the device 9 from reflected With One Of its t y o e which me suradiations. energy radiated through this hole from the bath whe th devi9 i photronic n, t when the converter is in operation, said devicetemperature of the bath may be determined by 4 being electrically respive to li h and in oirconnecting the device through lines ill with anQuit h a device for measuring its electrical electrical recorder IIwhich is illustrated as p nse.

, being a milllammeter recording device containing A' method ofmeasuring ener y r di d y the necessary amplifiers and provided with athe bath in a Bessemer converter when the latter traveling graph stripI2 on which is continuously s in Operation, said met 0d'i Opticallyrecorded the electrical response of the device 9 sighting a dia t n ymeasuring device on to the radiations it receives from the convertersaid bath through at least one of the tuyere holes bath by way of thetuyere hole. Calibration of the converter and operating said device-tomay be efiected so that the response recorded is measure energy radiatedfrom said bath through 'directly translated into terms of temperature onsaid hole.

the strip I2, the drawing illustrating this strip JAMES WARD PERCY. inenlarged scale to show what a temperature record or one Bessemer blowlooks like.

